1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 2001 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.
3、A.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-7161 FAX: (724) 776-0243TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS: http:/www.sae.org400 Commonwealth Drive, Warrendale, PA 15096-0001AEROSPACE MATERIAL SPECIFICATIONAMS 7284/1Issued JUL 1990Reaffirmed APR 2001Rings, Se
4、aling, Phosphonitrilic Fluoroelastomer (FZ)Aviation Fuel Resistant65 - 75 Shore A1. SCOPE:1.1 Form: This specification covers a phosphonitrilic fluoroelastomer (FZ) in the form of molded rings.1.2 Application: Primarily for use in aircraft fuel systems operating from -55 to +150C (-67 to +302F).1.3
5、Classification: Rings having a nominal hardness of 70 durometer Shore A, or equivalent.2. APPLICABLE DOCUMENTS: See AMS 7284.3. TECHNICAL REQUIREMENTS: 3.1 Basic Specifications: The complete requirements for procuring the sealing rings described herein shall consist of this document and the latest i
6、ssue of the basic specification, AMS 7284.3.2 Properties: Shall conform to the following requirements, determined in accordance with test methods listed in AMS 7284.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license
7、 from IHS-,-AMS 7284/1 SAE AMS 7284/1- 2 -3.2.1 As received: 3.2.1.1 Hardness, Shore A, or equivalent 70 53.2.1.2 Tensile Strength, minimum 1300 psi (8.96 MPa)3.2.1.3 Elongation, minimum 125%3.2.1.4 Specific Gravity Preproduction Value 0.023.2.1.5 TR10-50, maximum -50C (-58F)3.2.1.6 Glass Transition
8、, Onset, maximum -57C (-71F)3.2.2 Dry Heat Resistance: (70 hours at 150C (302F)3.2.2.1 Hardness Change, Shore A 53.2.2.2 Tensile Strength Change 15%3.2.2.3 Elongation Change 20%3.2.2.4 Compression Set, 25% deflection,% of original deflection, maximumO-ring Cross Section0.060 to 0.110 inch (1.52 to 2
9、.79 mm) inclusive 40%Over 0.110 inch (Over 2.79 mm) 30%3.2.3 Fuel Resistance: Ref. Fuel A, Ref. Fuel B,70 hours at 107C (225F) ASTM D 471 ASTM D 471 AMS 30223.2.3.1 Tensile Strength Changemaximum -25% -35% -30%3.2.3.2 Elongation Changemaximum -10% -15% -10%3.2.3.3 Volume Change +5 to +15% +10 to +25
10、% +10 to +20%3.2.3.4 TR10-50, maximum -51C -51C -51C(-60F) (-60F) (-60F)3.2.4 Fuel Resistance, Ref. Fuel B, ASTM D 47170 hours at 150C (302F)3.2.4.1 Tensile Strength Change, maximum -45%Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking perm
11、itted without license from IHS-,-AMS 7284/1 SAE AMS 7284/1- 3 -3.2.4.2 Elongation Change, maximum -15%3.2.4.3 Volume Change +10 to +25%3.2.5 Differential Soak Test: 3.2.5.1 70 hours at RT, Ref. Fuel A, % Swell AD1then 70 hours at RT, Ref. Fuel B, % Swell AD2Differential Swell (AD2 - AD1), maximum 7%
12、Volume Swell, 48 hours dryout at RT +1 to 3%3.2.5.2 70 hours at RT, Ref. Fuel B, % Swell AD3then 70 hours at RT, Ref. Fuel A, % Swell AD4Differential Swell (AD3 - AD4), maximum 5%Volume Swell, 48 hours dryout at RT +1 to 4%3.3 Part Numbers: Shall consist of the following:1. The letters “AMS” and the
13、 specification number.2. A dash followed by the appropriate dash number from AS568.Example 1 Example 2AMS 7284/1-031 AMS 7284/1-1224. QUALITY ASSURANCE PROVISIONS: See AMS 7284.5. PREPARATION FOR DELIVERY: See AMS 7284.6. ACKNOWLEDGMENT: See AMS 7284.7. REJECTIONS: See AMS 7284.Copyright SAE Interna
14、tional Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-AMS 7284/1 SAE AMS 7284/1- 4 -8. NOTES: See AMS 7284.PREPARED UNDER THE JURISDICTION OF AMS COMMITTEE “CE“Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-
